Chemistry, asked by snehagarg1380, 10 months ago

On the basis of thermochemical equations (a),
(b) and (c), find out which of the algebric
relationships given in options (i) to (iv) is correct.
(1) C (graphite) + O₂(g) ⟶ CO₂(g);
△ᵣH = x kJ mol⁻¹
(2) C(graphite) + 1 O₂(g) ⟶ CO (g);
2
△ᵣH = y kJ mol⁻¹
(3) CO (g) + 1 O2 (g) ⟶ CO₂ (g);
2
△ᵣH = z kJ mol⁻¹
(a) z = x + y (b) x = y – z
(c) x = y + z (d) y = 2z – x

Answers

Answered by bestwriters
4

The algebraic  relationships given is (c) x = y + z

Explanation:

From question, the change in enthalpy due to formation of CO₂

Δf° H (CO₂) = x

From question, the change in enthalpy due to formation of CO

Δf° H (CO) = y

The change in enthalpy due to formation of reactant:

ΔrH = Δf° H (CO₂) - Δf° H (CO) - 1/2 Δf° H (O₂)

∵ 1/2 Δf° H (O₂) = 0

Now,

ΔrH = Δf° H (CO₂) - Δf° H (CO) - 0

∴ z = x - y

Similar questions